Swartzia katawa R.S.Cowan

  • Authority

    Cowan, Richard S. 1967. Swartzia (Leguminosae, Caesalpinioideae Swartzieae). Fl. Neotrop. Monogr. 1: 3-228. (Published by NYBG Press)

  • Family

    Fabaceae

  • Scientific Name

    Swartzia katawa R.S.Cowan

  • Type

    Type collection. N. Guppy 275 (F.D. 7251) (holotype US 2438235; isotype NY), 7 mi E of mouth of Onoro R., Upper Essequibo, Guyana, Sept. 1952.

  • Description

    Latin Diagnosis - Arbor 20 m alta, trunco 12 cm diametro, cortice fusco-brunneo, ramulis minute strigulosis; stipulae persistentes, 3-8 mm longae, lineari-lanceolatae glabrae; petioli 2.5-4.5 cm longi, alati, ala ad 8 mm lata, oblanceolata et apice bistipellata, supra glabra costa puberula excepta, infra sparse minute strigulosa vel glabra; rhaches 3-9 cm longae, alatae, ala anguste oblanceolata, jugorum basi stipellatae, supra costa puberulae, infra sparse strigulosae; foliola 1- vel 2-jugata, petiolulis 1.5-2 mm longis, puberulis, laminis 7-12.5 cm longis, 3-6 cm latis, ellipticis base angustatis sed ad postremum rotundatis cordulatisque, apice obtuso-acuminatis, laminis supra ad costam puberulis et infra ad costam minute strigulosis, costa supra impressa et venis primariis planis, infra plus minusve salientibus; inflorescentiae axillares ad ramuligerae, 6-12.5 cm longae, axe minute striguloso, bracteis persistentibus, 0.6-0.8 mm longis, triangularibus acutis externe minute strigulosis, bracteolae nullae; pedicelli 4 mm longi, minute strigulosi, alabastra globosa, 4 mm diametro, sparse strigulosa minute; calycis segmenta 3 vel 4, externe sparse minute strigulosa intus glabra; petalum nullum; stamina maiora 2 glabra, filamentis 3.5 mm longis, antheris ca 1.2 mm longis et 0.6 mm latis, oblongo-ovalibus, minora glabra, filamentis 3-3.5 mm longis, antheris orbicularibus; stigma punctiforme; stylus ca 0.7 mm longus, glaber; ovarium ovale, ca 3 mm longum et 1.5 mm latum, minute strigulosum ad suturam dorsualem, gynophoro 1.5 mm longo, glabro; fructus non visus.

  • Discussion

    Swartzia katawa does not approach very closely any of the other species of the apetalous series but it is perhaps nearest S. tessmannii. From this species, as well as the other relatives, the new species differs in having a distinctly alate leaf rachis and a gynoecium which is nearly glabrous.

  • Common Names

    Katawa

  • Distribution

    (Fig. 30). Known only by the type collection from the far-interior of Guyana at ca 300 m alt.

    Guyana South America|